I do think that Haylen is better in almost every way possible compared to Aywin but at the same time, the fact that she's not Leto's real mother just takes sooo much away from her corruption in my eyes it's insane. Being able to see Leto have sex with Haylen in the Revenge ending at the expense of getting a real mother NTR was just the worst trade i've ever seen.
I'm not big on the whole Harem thing to begin with so the Revenge ending in HC2 was easily the worst ending for me, the ONLY thing i liked about it was Aywin's fate, how she ended up becoming basically a whore for Noah's guards, but other than that... not a single thing i could think of, it didn't even feel like it was "revenge", it felt more like Noah was just collecting girls like they were Pokemons once he got rid of the antagonists, the blacksmith's wife willingly walked up to Noah and asked him if she could join his Harem for crying out loud. xd
I know that we're not getting a "True" ending for HC3, only an NTR ending, a Revenge ending and a Happy ending, which i'm totally fine with, but i hope that Leto's revenge is gonna be significantly different from Noah's because i'm not exacly keen on paying for and Update just to see Leto show off his harem of maids, princesses, nuns and barmaids.
If there's even a shred of dignity left in Leto by the end of the game, he won't even poke the girls with a stick let alone fuck them. Also, how is adding sex addicted girls to your harem a punishment for them, especially since every single one of them loves you to begin with.
Leto fucking Haylen during the Revenge ending doesn't even make sense in the first place, i mean sure, we've seen hints already that Haylen feels something more than just maternal love towards Leto but Leto still thinks of her as a some sort of mother, just because she betrays him down the line doesn't mean that Leto should go ahead and fuck her out of spite as a form of revenge, which again, wouldn't even be a punishment for her cause Haylen clearly loves Leto, and by that time she's also gonna be addicted to sex.
Despite not being blood related i strongly believe that Leto and Haylen should not have any form sexual interaction between them at any point in the game, i'd much rather see Haylen end up like Aywin during the Revenge ending.